Mounting and operating means for radio tuning units



1949 w. A. SCHAPER MOUNTING AND OPERATING MEANS FOR RADIO TUNING UNITSFiled March 15, 1947 HII ll] 14 1:4

INVENTOR. W/ LL /AMA.5CH/7PER.

Patented Nov. 8, 1949 MOUNTING AND OPERATING MEANS FOR RADIO TUNINGUNITS William A. Schaper, Cicero, Ill., assignor to The Mantle LampCompany of America, Chicago, 111., a corporation of Illinois ApplicationMarch 15, 1947, Serial No. 734,888

17 Claims. (Cl. 171-242) The invention pertains to a structure providingsimple and inexpensive mounting means for the several parts involved ina radio tuning unit by means of integral lugs and tongues punched andformed from a single sheet metal plate.

Said invention also provides improved operating mechanism for themovable parts of said radio tuning unit; in addition the inventionprovides an improved form for supporting a drum for rotary movement onsaid mounting plate, together with an endless flexible band extendingfrom said drum to operate said movable parts, the support of the drumfrom the mounting plate being complete whether an operating shaft isassociated with said drum or not, to the end that the complete tuningunits of the invention may be manufactured and ready for use, andsubsequently assembled in any one of different desired associations asmay be required in different kinds of complete radio apparatus. Furtherobjects, advantages and capabilities will later more fully appear.

The invention will be best understood by reference to the accompanyingdrawings showing preferred embodiments thereof in which:

Fig. 1 shows in plan view a complete tuning unit in accordance with theinvention,

Fig. 2 shows in side elevation the tuning unit illustrated in Fig. 1,

Fig. 3 shows in end view the tuning unit illustrated in Fig. 2,

Fig. 4 is a fragmentary plan view on an enlarged scale, of a portion ofthe mounting plate illustrated in Fig. 1, with the parts of the tuningunit removed therefrom,

Fig. 5 is a sectional view of the plate on the line 5-5 of Fig. 4,

Fig. 6 is an end view looking toward the right hand end of Fig. 5,

Fig. 7 is a sectional view, to an enlarged scale, on the line 1-1 inFig. 2,

Fig. 8 shows in a view similar to Fig. 2 the mounting of a plurality oftuning units constructed in accordance with Figs. 1 and 2 and mountedfor simultaneous operation by a single operating shaft,

Fig. 9 is a section on the line 9-9 of Fig. 2.

Similar numerals refer to similar parts throughout the several views.

As shown in' Fig. 1, a single mounting plate I of fiat sheet metal isemployed, which has punched and formed therefrom upwardly extendingguide posts 2, 3, I and 5 around which a flexible band 6 of suitablematerial, for example its ends secured to a rotary drum I, a tensioningspring 8 being secured to the drum and engaging the ends of said band toexert a desired tension thereon. The hub 9 of the drum engages a sleeveI0 extending through the plate I with a free-turning fit, which sleevebelow the plate I is headed as shown in Figs. 2 and 'l to preventappreciable axial movement of the drum relatively to the plate. Thesleeve and the drum are secured together, for example by a solderedconnection II (see Fig. 1) to prevent separation of the sleeve from thedrum and movement of the sleeve relatively to the drum. Sleeve III ispreferably fixed to rotate with shaft S, but the drum is operativelyrotatable on plate I regardless of whether or not a shaft is usedtherewith. As shown in Fig. 2, the band 8 is supported in a plane justabove and parallel with the plate I, the guide posts 2-5 each havingformed in its active surface a groove to slidably receive and guide theband in its movement thereover.

As shown in Fig. 1, coil forms I2 and I3 are mounted on the plate I, bymeans below described, and adjacent and parallel with the band 8,ferromagnetic cores I4 and I5 being provided for axial movement in thecoil forms I2 and I3 and securely connected by sheet metal clips I6 andII with the endless band 6 to move therewith, as later more fullyexplained. The coil forms I2 and I3 are preferably located on diagonalcorner portions of the mounting plate I adjacent opposite sides of theband 8, so that turning the drum 1 simultaneously moves the cores II andI5 equal amounts and in opposite directions relatively to the coil formsI2 and I3, respectively.

The manner of supporting the drum I from the mounting plate I by meansof the headed sleeve I0, and the mounting of this sleeve on shaft S, ismore clearly shown in Fig. 7. Each of the coil forms I2 and I3 issupported on plate I by a U-shaped mounting member I 8 having a fiatbase portion a, parallel with plate I, and at each end outwardlyextending members I8 and 20 the free end of each of which is formed witha central notch 2I to receive a complementally notched bracing bar 22.The coil forms are fixedly mounted in holes 23 and 24 in the outwardlyextending members It and 20 of the mounting members, there being one ofthese holes in each end thereof.

Novel means are provided for quickly, easily, removably and securelymounting the mounting members on the plate I, in which the plate I isformed at suitably spaced apart locations with a cord or flexible wire,extends, which band has T-shaped slits or cuts, the base end of themiddle top cross bar of the T being spaced from the plate a distanceequal to the length of the middle bar of the T the end of the middle baraway from the cross bar being integrally connected with the plate. Thiswill best be understood in Figs.

4-6, in which the cross bar of the T is indicated at 25'and the middlebar thereof at 2B. The hole from which the cross bar was punched isindicated in Fig. 4 at 27 and the hole from which the middle bar waspunched at 23. When a mounting member 58 is to be fixed on only one 5surface of plate i in one of the diagonal corners thereof, or elsewhereas desired, a pair of said metal Ts will be punched out from the plateand pushed outwardly from the plate on the side desired, as seen at theupper side of the plate in Figs. 5 and 6. 7

When a mounting member is to be fixed at both sides of the plate,another pair of Ts will be punched out to extend on the other side ofthe plate as seen at the bottom side of the plate in Figs. 5 and 6. Asmany of these pairs of Ts may be formed as desired in the late in anydesired locations, and the Ts of each pair be spaced apart any desireddistance. The height of the middle bar of each of said Ts will preferablbe approximately the thickness of the base a of the mounting member I8so that said thickness may be snugly pushed under the ends of the crossbars of each pair of Ts. To enable this,

said mounting member base a is formed with a pair of T-shaped slots asseen in Fig. 9 at 29. As will be understood the wider portions of theslots 29 will register with the cross bars of the Ts when being appliedto the plate, and when said pair of T cross bars has been insertedtheremember on the plate.

As will be understood as many pairs of these complemental T formationsmay be formed as desired, for mounting any desired number of mountingmembers and coil forms on the plate.

In Fig. 1 two mounting members, with a coil form in each, are shown onthe upper surface of plate I. In Fig. 2, said two are shown on the uppersurface of the plate and one mounting memher and coil form on the lowersurface. Figs.

5 and 6 show how a mounting member may be arranged for on both sides ofthe plate. From this it will be seen that various arrangements andlocations of mounting members and coil forms may be provided for in anydesired loca- As seen in Figs. 1 and 2, the plate I at one end is formedwith an integral mounting flange 30 extending upwardly at approximatelyright angles to the plate and formed at each end with a rectangularlyextending locating lug 3| seated in an opening 32, said holes 32 beingformed in any desired supporting member 33 upon which the radio tuningunit is mounted. Flange 30 at approximately its middle position isformed with a threaded hole receiving the inner threaded end 7 member isrotated to tighten the flange 30 against the supporting member. Theprojections 3! and the screw member 34 are positioned a sufficientdistance above the plane of plate I to afford the necessary stability ofthe plate and the parts mounted thereon when the screw member istightened in the flange and supporting member. By this arrangement onlya single screw is required to mount the plate and associated parts onthe support.

Plate l at suitable locations is provided with any desired number ofpairs of tongues 36 and 3V bent upwardly at preferably right angles fromthe plate, suitable slits being formed in the plate from which saidtongues are bent so that the tongues are integrally connected at one endwith the plate. To these tongues, trimmer capacitors 38 and 39 aresecured in any desired manner,-

as shown in Figs. 1, 2, 3 and 8. These capacitors may be located onplate l in positions best accommodated to the other associated parts onthe plate.

As seen in Fig. 1 the coil forms, i2 and I3, and their axially movablecores i4 and [5, are positioned on opposite sides of the band 6, and ondiagonally opposite corners of the plate, as a result of which rotationof drum I will cause movement of the cores in opposite directions andfrom opposite ends of the coil forms. The connection of the outer endsof the clips l6 and H with the band 6 is positive so that movement ofthe band will cause corresponding movement of the cores, but themovement of the cores will be in opposite. directions with relation toeach other.

As pointed out earlier herein, coil forms may be mounted on one or bothsides of plate I. Fig. 2 shows two coil forms on the upper surface ofthe plate and one on the lower'surface, the latter being indicated at40, and being mounted in a mounting member N3 of the same construc--tion as those previously described. Coil form 40 has axially movabletherein a core 4! to which is fixed a sheet metal clip 42 whoselaterally projecting end portion passes through a longitudinal slot 43formed in plate I to extend parallel with band 6. After passing throughslot 43 the end portion of clip 42 is fixed to band 6 so as to at alltimes move therewith when the drum 1 is rotated. This arrangement ofparts enables simultaneous axial movement of the cores even when mountedon opposite sides of the plate. In the mounting of Fig. 2, the cores l4and 4| move in the same direction and core IS in the opposite direction,but all actuated by a single drum.

In Fig. 8 I have shown two plates spaced apart, but both mounted in thesame manner as described earlier herein, to the supporting mem ber 33.To give added rigidity to the form of tions on either or both sides ofthe plate. 30

Fig. 8 the plates I are provided at diagonally opposite corners withears 44, each with an opening to receive an elongated bolt having at itsends nuts 45 which when tightened clamp brace members 46 rigidly betweenthe plates. In this form there are mounted two coil forms and the otherassociated parts on the upper surface of the upper plate, arranged asshown in Fig. 1 and on the upper surface of the plate of Fig. 2. Asimilar arrangement of coil forms and associated parts are shown on theupper surface of the lower plate of Fig. 8. The drum on the upper plateand the drum on the lower plate are in alignment so that a single shaftS may operate both drums simultaneously. The operation of the parts onthe upper surface of each of the plates of Fig. 8 is the same as thatdescribed in connection with Fig. 1. As seen from the foregoing. I haveprovided mounting means for radio tuning units, capable of variouscombinations and arrangements of units, and all operable simultaneouslyfrom a single shaft, or operable as single or multiple units actuated bya single drum regardless of whether or not a shaft is used for rotatingthe flat sheet metal mounting plate having integral band guiding postsformed therefrom and projecting from the surface of said plate, a banddrum mounted on said plate for rotary movement, a flexible bandextending under tension around said posts and having its ends connectedwith said drum, coil forms supported by said plate parallel with saidband, ferromagnetic cores movable axially in said coil forms, connectingclips extending from said cores and secured to said band, whereby rotarymovement of said drum simultaneously moves said cores axially relativelyto said coil forms, said plate havingintegral lugs formed therefrom andsecuring said coil forms to said plate, and a rotary shaft connectedwith said drum.

2. Mounting and operating mechanism for radio tuning units, including incombination a fiat sheet metal mounting plate having integral bandguiding posts formed therefrom and projecting from the surface of saidplate, a band drum mounted on said plate for rotary movement, a flexibleband extending under tension around said posts and having its endsconnected with said drum, coil forms supported by said plate parallelwith said band, ferromagnetic cores movable axially in said coil forms,connecting clips extending from said cores and secured to said band,whereby rotary movement of said drum simultaneously moves said coresaxially relatively to said coil forms, said plate having integral lugsformed therefrom and securing said coil forms to said plate, and arotary shaft connected with said drum, the mounting of said drumincluding a headed sleeve extending through said plate for rotarymovement and into and secured to the hub of said drum, said sleevehaving a bore for receiving said shaft and for connection therewith,whereby the mounting of said drum on said plate is effected by saidsleeve regardless of the presence of said shaft in said sleeve.

3. Mounting and operating mechanism for radio tuning units, including incombination a fiat sheet metal mounting plate having integral bandguiding posts formed therefrom and projecting from the surface of saidplate, a band drum mounted on said plate for rotary movement, a flexibleband extending under tension around said posts and connected with saiddrum, coil forms supported by said plate parallel with said band,ferromagnetic cores movable axially in said coil forms, connecting clipsextending from said cores and secured to said band, whereby rotarymovement of said drum simultaneously moves said cores axially relativelyto said coil forms, said plate having integral lugs formed therefrom andsecuring said coil forms to said plate, and

a rotary shaft connected with said drum, said coil forms being mountedon diagonally opposite portions of said plate and said cores havingmovement from opposite ends of said coil forms, and said cores havingconnection with opposite sides of said band, whereby rotary movement ofsaid drum simultaneously moves said cores in opposite directionsrelatively to said coil forms respectively.

4. Mounting and operating mechanism for radio tuning units, including incombination a flat sheet metal mounting plate having integral bandguiding posts formed therefrom and projecting from the surface of saidplate, a band drum mounted on said plate for rotary movement, a flexibleband extending under tension around said posts and connected with saiddrum, coil forms supported by said plate parallel with said band,ferromagnetic cores movable axially in said coil forms, connecting clipsextending from said cores and secured to said band, whereby rotarymovement of said drum simultaneously moves said cores axially relativelyto said coil forms, said plate having integral lugs formed therefrom andsecuring said coil forms to said plate, and a rotary shaft connectedwith said drum, said plate having an integral mounting flange andintegral locating lugs extending from said flange, whereby a singlemounting screw is required to mount said mounting plate on a desiredsupport.

5. Mounting and operating mechanism for radio tuning units, including incombination a flat sheet metal mounting plate having integral bandguiding posts formed therefrom and projecting from the surface of saidplate, a band drum mounted on said plate for rotary movement, a flexibleband extending under tension around said posts and connected with saiddrum, coil forms supported by said plate parallel with said band,ferromagnetic cores movable axially in said coil forms, connecting clipsextending from said cores and secured to said band, whereby rotarymovement of said drum simultaneously moves said cores axially relativelyto said coil forms, said plate having integral lugs formed therefrom andsecuring said coil forms to said plate, and a rotary shaft connectedwith said drum, two of said coil forms being on opposite sides of saidmounting plate, said plate having a slot therethrough to receive theconnecting clip extending from the core on the side of said plate remotefrom said band.

6. Supporting and operating means for a radio tuning unit including acoil form and a core axially movable in said coil form to effectpermeability tuning, which supporting and operating means comprises amounting plate having bandguiding posts struck out of said plate toextend outwardly therefrom to slidably guide a band thereover, earspunched and bent out of said plate to project from the same surfacethereof as said posts, a coil form mounting member having a base portionformed with slots removably and slidably mounted over said ears, a banddrum rotatably mounted on said plate, a flexible band secured to saiddrum and slidably passing tautly around said posts, and an angularconnecting clip secured to said band and for connection with a coreaxially movable in a coil form to be carried by said coil form mountingmember, whereby rotation of said drum moves the band around said postsand simultaneously may move a core in a coil form.

enemas 7. Supporting and operating meansfor a radio tuning unit asclaimed in claim 6, in which said drum has one face rotatably mounted onone face of the plate, said plate having an opening concentric with thedrum, a member fixed to the drum to extend through said opening, saidlast mentioned member having a dense contacting the other face of theplate to rotatably secure the drum to the plate.

8. Supporting and operating means for a radio tuning unit as claimed inclaim 7,including a shaft extending through said last mentioned memberand said drum.

9. Supporting and operating means for a radio tuning unit including coilforms and cores axially movable in said coil forms to effectpermeability tuning, which supporting and operating means comprises afiat mounting plate having a plu= rality of band-guiding posts struckout from the plate and havin curved guiding surfaces, a band slidablypassing around one side of said curved surface of each post so as tohave two parallel sides, a pair of coil form mounting members on saidplate one on one side and one on the other side of said parallel bandsides for supporting coil forms with cores respectively and axiallymovable therein, a drum rotatably mounted on the plate, the two ends ofthe band being fixed to the drum, and an angular connecting clip forconnection with each core, each of said clips being fixed at one end tothe band and for connection at its other end with a core axially movablein a coil form to be supported by one of said coil form mountingmembers. 1

10. Supporting and operating means for a radio tuning unit as claimed inclaim 9, in which integral ears are struck up from the plate, and saidcoil forms are removably connected to the plate by said ears.

11. Supporting and operating means for a radio tuning unit as claimed inclaim 10, in which a further coil form mounting member is secured to theother side of the plate for supporting a coil form with a core axiallymovable therein, said plate having an elongated slot, and an angularlyextending connecting clip fixed at on end to the band and extendingthrough said slot for connection at its other end with a core axiallymovable in a coil form to be supported by said further coil formsupporting member, whereby cores of coil forms on opposite faces of theplate may be operated by the same band.

12. Supporting and operating means for a radio tuning unit includingcoil forms and cores axially movable in said coil forms to effectpermeability tuning, which supporting and operating means comprises aflat mounting plate having guide posts, coil form mounting membersmounted on the plate for supporting coil forms with cores respectivelyand axially movable therein, a drum rotatably mounted on the plate onone face, a tubular hub in said drum, a sleeve fixed in said hub andextending through an opening in the plate, a flange on said sleeverotatably bearing on the other face of the plate, a flexible bandpassing around said drum and said posts, and clips connected with saidband and for connection with cores axially movable in coil forms to besupported by said coil form mounting members.

13. Supporting and operating means for a 70 radio tuning unit as claimedin claim 12, in which said posts are struck up from the plate and curvedon the side over which the band passes.

14. Supporting and operating means for a radio tuning unit, as claimedin claim 12, in which a shaft is mounted in the sleeve for rotating thedrum.

15. Supporting and operating means for a radio tuning unit includingcoil forms and cores axially movable in said coil forms to effectperme-- ability tuning, which supporting and operating means comprises afiatsheet-metal mounting plate having a pair of integral headed earsstruck up from one face thereof, a pair of integral headed ears struckup from the other face thereof, a coil form mounting member having slotspassed over the headed ears on one face of the plate, a coil formmounting member similarly mounted on said ears on said other face of theplate, said coil form mounting members being adapted to respectivelysupport coil forms with cores axially movable therein, a drum rotatablymounted on the plate, guide posts, a flexible band on said drum andslidable over said posts, and angular clips connected with said band andfor connection with cores axially movable in coil forms to be supportedby said coil form mounting members.

16. Supporting and operating means for a radio tuning unit as claimed inclaim 15, in which said plate is formed with an elongated slot, and oneof said clips passes through said slot.

17. Supporting and operating means for a radio tuning unit includingcoil forms and cores axially movable in said coil forms to effectpermeability tuning, which supporting and operating means comprises apair of spaced apart mounting plates each having integral headed earsstruck up from a face thereof, a plurality of coil form mounting memberssecured to said ears on each plate, a drum on each plate, each drumbeing rotatably mounted on its plate and having a headed sleeve the headof which is rotatably mounted on the other side of the plate, the coilform mounting members on each plate being adapted to support coil formswith cores respectively and axially movable therein, a plurality ofguide posts, a flexible band and clips connected with said band and forconnection with cores axially movable in coil forms to be supported by 7said mounting members, and a single shaft on which both of said drumsare mounted.

WILLIAM A. SCI-IAPER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 881,511 Waters Mar. 10, 19081,355,462 Francis Oct. 12, 1920 1,533,209 Radu Apr. 14, 1925 1,824,708Davis et al Sept. 22, 1931 1,867,206 Brady July 12, 1932 1,935,354Dressel Nov. 14, 1933 2,198,354 Kaufman Apr. 23, 1940 2,226,822 KirkDec. 31, 1940 2,260,985 Benton Oct, 28, 1941 2,272,433 Schaper Feb. 10,1942 2,389,986 Koch Nov. 2'7, 1945 FOREIGN PATENTS Number Country Date461,092 Great Britain Feb. 10, 1937

